Data set used for application: state.x77. state.x77 - matrix with 50 rows and 8 columns giving the following statistics in the respective columns: - Population: population estimate as of July 1, 1975 - Income: per capita income (1974) - Illiteracy: illiteracy (1970, percent of population) - Life Exp: life expectancy in years (1969-71) - Murder: murder and non-negligent manslaughter rate per 100,000 population (1976) - HS Grad: percent high-school graduates (1970) - Frost: mean number of days with minimum temperature below freezing (1931-1960) in capital or large city - Area: land area in square miles Source U.S. Department of Commerce, Bureau of the Census (1977) Statistical Abstract of the United States. U.S. Department of Commerce, Bureau of the Census (1977) County and City Data Book.